Car is acting like it is low and then dead but the battery is good

[Minton444]

Went to start my 06 e60 525xi this morning. It's acting like the battery was almost dead. After two tries it stopped turning over as if the battery was dead. I took my battery to the local advance auto store for a test and they said it was a good battery with 811 cold cranking amps out of 900 with something like 12.7 volts. Does anyone know what could cause this issue and how to fix it?

[e91Owner]

Originally Posted by Minton444

Went to start my 06 e60 525xi this morning. It's acting like the battery was almost dead. After two tries it stopped turning over as if the battery was dead. I took my battery to the local advance auto store for a test and they said it was a good battery with 811 cold cranking amps out of 900 with something like 12.7 volts. Does anyone know what could cause this issue and how to fix it?

Sounds like your starter is getting bad, but it could also be the grounds. There are no other symptoms other than slow starts.

To test for the ground, attach a jumper cable from the block to the ground lug in the engine bay. If it cranks right up with it, but slowly without it, you'll need a new ground strap.

If it's still slow with the ground jump, then it's starter replacement time.